lockfile: refresh

[lucab]

This refreshes Cargo lockfile in order to shake off stale transitive
dependencies.

[lucab]

CI gets stuck with:

08:11:49  cargo test "--target-dir=target"
08:11:49   Downloading crates ...
[...]
08:11:57     Compiling zincati v0.0.24 (/home/jenkins/agent/workspace/zincati_PR-758)
08:12:06      Finished test [unoptimized + debuginfo] target(s) in 16.38s
08:12:06       Running unittests (target/debug/deps/zincati-30e92246b6ccb93c)
08:12:06  
08:12:06  running 65 tests
[...]
08:12:06  test strategy::fleet_lock::tests::test_url_simple ... ok
08:12:06  test weekly::utils::tests::proptest_weekday_from_string ... ok
08:12:06  test weekly::utils::tests::proptest_time_from_string ... ok
08:12:08  test update_agent::tests::state_machine_happy_path ... ok
08:13:15  test cincinnati::client::tests::test_graph_client_error_display has been running for over 60 seconds
08:13:15  test cincinnati::client::tests::test_graph_http_error_display has been running for over 60 seconds
08:13:15  test cincinnati::client::tests::test_graph_server_error_display has been running for over 60 seconds
08:13:15  test cincinnati::mock_tests::test_empty_graph has been running for over 60 seconds
08:13:15  test fleet_lock::mock_tests::test_pre_reboot_error has been running for over 60 seconds
08:13:15  test fleet_lock::mock_tests::test_pre_reboot_lock has been running for over 60 seconds
08:13:15  test fleet_lock::mock_tests::test_steady_state_error has been running for over 60 seconds
08:13:15  test fleet_lock::mock_tests::test_steady_state_lock has been running for over 60 seconds
08:13:15  test fleet_lock::tests::test_http_error_display has been running for over 60 seconds
08:13:15  test fleet_lock::tests::test_service_rejection_display has been running for over 60 seconds
08:13:15  test rpm_ostree::mock_tests::test_downgrade has been running for over 60 seconds
08:13:15  test rpm_ostree::mock_tests::test_simple_graph has been running for over 60 seconds
08:13:15  test strategy::immediate::tests::can_finalize has been running for over 60 seconds
08:13:15  test strategy::immediate::tests::report_steady has been running for over 60 seconds
08:13:15  test strategy::periodic::tests::test_empty_can_finalize has been running for over 60 seconds
08:13:15  test strategy::periodic::tests::test_non_utc_time has been running for over 60 seconds
08:13:15  test strategy::periodic::tests::test_report_steady has been running for over 60 seconds

[lucab]

The CI got otherwise fixed (see coreos/fedora-coreos-tracker#1186), but a lockfile refresh is good to have anyway.

/cc @jlebon